Another cash-constrained dot.com, Peapod, an online grocer, last month sold a 51% stake to Royal Ahold, an offline grocer.

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In five years, Tesco.com has grown to become the world's biggest online grocer.

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The collapse of online grocer Webvan, once Niman's biggest client, has hurt.

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Adopting a different business model to most of its rivals, Tesco.com has grown in five years to become the world's biggest online grocer.

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Unilever, for instance, is using agent-based modeling software to analyze the purchasing and social patterns of 150, 000 customers who use Swiss online grocer LeShop.ch.

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Soda fans misty for New England's classic Moxie, Kentucky's Ale-8-1 or Michigan favorite Vernors Ginger Ale can get their fix via Virginia Beach-based online retailer, the aptly named The Hard To Find Grocer.

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